A petrol engine consumes 10 kg of petrol in 1 hour. the calorific value of petrol is 11.4×10³ cal/gm .the power of the engine is 20kwatts. calulate the efficiency of engine

Which surface feature of the moon is characterized by mountainous areas? terrae craters maria regolith

Which object is most likely represented by a dot?

An ideal otto cycle has a compression ratio of 10.5, takes in air at 90 kpa and 40°c, and is repeated 2500 times per minute. using constant specific heats at room temperature, determine the thermal efficiency of this cycle and the rate of heat input if the cycle is to produce 90 kw of power.